Apparatus for rerubbering pneumatic tires



June 8 1926.

A. EYMAEL ET AL APPARATUS FOR RERUBBERING PNEUIATIC TIRES med M'aroh e. 1925 frrrfl In vlnflflf -a removable metal band bearin Patented June 8, 19x26.l

UNITED 'STATES muon Enum. Nn :nonna A.

PATENT OFFICE.

DALLESTE, OFy BRUSSELS, BELGIUI. l

\ ,l I Arrm'rus ron nnatmnnanre rrmmu'rrc Trans.

Application ma umn s, im, serena-13,569, na in mmm umn 14, im.

ThisA invention relates to an 'apparatus for re-rubbering worn pneumatic tire 'covers in which the holding-up'ofv the tire cove 4nthe mould is effected by means of an in r expanding device. Y

Ingthe known apparatus of thisl kind, th/c holding-up of the tire 4cover in the mould is effected by means of straps on rigid cores, flexible tubes, air chambers or water' chambers, sand bags etc., placed inside the tire cover.

-The improved apparatus of the present invention compries a mouldv composed of two parts inside which there may be arran ed in re ief the designs that are to be rep uced u n the tire cover, an expansible tubular annm us, said annulus-being composed of a suitable plurality oftubular elements contoured externally according to the inner contour of the tire cover and connected together in such a manner as to allow of any element moving relatively to the adjacent element, and

finally an expanding device bearing against the annulus throughout the entire periphery of the latter, the ends of the said expandin device (after it has been placedin position being adapted to be moved apart by means of a suitable tool in such a manner aste cause the annulus to litV closely against the entire inner surface of the tire cover.l

For this purpose, according to a preferred constructional form, the inner edges of the tubular annulus are bent inwards, and the expanding device whose side `faces have equal inclinations is adapted to engage like a wedge between the bent-in edges of 'the annulus in such a manner as, by expansion, to bring the Isaid annulus with uniformpressure into contact with the whole of the inner surface of the -tire cover.

Moreover, according to this invention-,for the purpose 01E` preventing an over-heating of the'canvasl la ers of the tire a circulation of cold air or t e like may be produced in the enclosed tube constituted by the annulus ing device.

A lin which:

when expanded and closed A practical form of the improved apparatus of this invention is illustrated'byv way of example in the accompanying drawings Figure 1 is aperspective view, partly .in section, ofthe improved apparatus ;V and Figure 2 is an elevation partly in :section ,The lever 13 is composed of two legs -14 llov after described.

' the expanding showing the tool for roducingthe expan'f sion l' of the innersur ace of the tire cover and. its application to the improved: apparatus illustrated in Figure 1. l

Figure 3 isa pers ectve view of a vulcanizing stove. .adapte for use with the'improve'd--apparatus of thisfinvention.'

In the illustrated example, the mould is.'V

composed -of two ternally the' 'external shape of the tire cover. These two mould parts are adapted to be fastenedl together by means of bolts 3. An interchangeable metallic band 4 is arranged inside these mould parts. This band bears in'reli'ef the design inscription to made in the outer surface of the tire.

The tireis mounted on a tubular annulus 5 composed vof a'circular series of .interfitting tubular elements having externally the internal contour of the tire and connected tother in such a manner as to allow of their y lndividual relative displacement by the action of the ex e lower edges of the elements, that is to say, their )edges situated towards the parts' 1 and 2, having incentre of the tire, are bent inwards as shown aft 9. I

10 is an expanding device composed'of a vmetal strip bent in the form' lof a hopthe ends of which arenot 4fixed together; this strip bears throughout thel whole of its'outer periphery against the tubular annulus 5. For this urpo'se the side faces 11 of the strip are velled so as to bearagainst the bent-in edges v9A of the annulus. 'Ilhe ex' pending device 10 terminates at its ends 107 in lugs 12 which allow the lever 13 (whlch is to be used together with the improved apparatus for effecting the expansion. of the` tire cover) vto engage and act upon the ex` vpending' device so as to move its two ends' Y10 away from `each other. .In this manner between the e '105l device engages like a wedge ges of theannulus and presses itwith a uniform pressure upon the entire inner surface of the tire cover.

pvoted on capin 15, and itted at their lends',

The efects of the expansion and the plac- A ing of the materialused for re-rubbering 'a paratus o are directed against the legs 14 of the lever in such a way that the extremities of said.

legs tend to move apart, which causas the sleeves 17 to bear tightly againstthe threads of rod 18. In order to reduce the ristance -to the friction produced by the rotation of said rod when it is desired tomove the sleeves toward each other foi; the purpose of forcing apart the ends 10 of the expander '10, two powerful springs 19 are interposed between the sleeves 17 and the lixed nuts 20 on the opposite ends of the rod 18, which are thereby compressed. 'The re-rubbering material 1s thus compelled to fit closely against and in all the slnuosities of the mould.

The whole pressure thus produced acts upon the new rubber which adheresto the tire cover without the risk of strainingth'e latter, vbecause the annulus bears againstthe whole ofthe inner surface of the tire cover,

and prevents the canvas layers from being .overstrained during the operation of com' edges of the annulus being bent inwards,

pressing and vulcanizing the rubber..

" In order toavoidover-heating the canvas.l

layers of the tire'cover acurrent of cold air may be caused to of the tubular annulus when the latter is clols'ld by the expandingdevice.

' chargedinto the annulus 5by a suitable device of an character connected to a tube 23 Figure 2 which opens into an aperture 2A ormed through the expander 10 at any de sired point; and the air ma esca through another aperture formed throng said'ex- 5 pander almost opposite-the first one;A

capa le of being usedv for re-ru ber-'ing to ivention.v Inthis stovethe mould' 11.-'2 mounted onja framing-,21 uponwhich a" bell orhod 22 can be'ldwered d 'v Fi 3 illustrates a vulcanizi stove pneumatic tire covers 'according "bpegion of vthe stove. f fing; t isto bei understood that many in the "usual way.

'ons may-be made inthe shape and arrange iiow in the interior ld air may, for example, bgA

of the expanding evlce the sald annulus 1s mntothe parte .constituting the improved` the-present invention t erebydeparting from the scope o fthe.' invent1on,and` that,the constructional What we c aim as our invention and desire to secure by Letters Patent'is':

` 1.'.An apparatus for re-rubbering 'worn pneumatic tlre covers in which the holdingup of the 'tire cover in themould is eiected by internal -expansion, comprising a mould composed of'two arts fitted internal] with a removable ban bearing in relief t e de# signs or Vinscriptions to be reproduced upon the tire cover, an extehsible annulus placed inside the -tire cover and composed of a suitable number of tubular elements having externally the internal contour of the tire"A cover and being connected to one another in such a manneras to'allow each tubular element to move relatively to the adjacent element, and an expanding device adapted to bea'r against the entire periphery of the I annulus and so .arranged .that after it has `benplaced in position its ends can be moved apart by Va sutabletool in such a manner 'as to applyfthe-annulus against the entire internal surface 'of the tire cover.

.21An apparatus or-fre-rubbering worn pneumatic tire 'covers in which the holdlngup of the tirecover in the mould is effected by internal lus placed inslde t l1e-tire cover,.the lower said apparatus comprising an expanding device consisting of a meta stri/p bent in the `form-of a hoop having equllly inclined latbrought with umiormA ressure into contact` tire cover.

3. .apparatus for re-rubbering worn 'pneumatic tire covers in which the holding .v up of thetire cover in the mould is effectedv by internal-expansion 'of an extensible annu-l placed inside the tire cover, such annulus elelllllnts mvab1y' fconnected to one another, 1.- and `for a circulation ofv consttuted'by the annuv composed off-a 'j plurality 'of tubular tures- ARNAUD EYMAEL.'

ansion 'of an extensible annuwith the-w olev of- =the 1nner surfaceof thai, A

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